Clarendon Press, 1990
Buku Referensi
Clarendon Press, 1987
Buku Referensi
editors, Humphrey Waldock, R.Y. Jennings
Oxford University Press, 1971
Buku Teks
Burrow, J.A., author
BlackWell Publishing, 2004
Buku Teks
Comfort, Jeremy, author
Oxford University Press, 1994
Buku Teks